yuu watase (absolute boyfriend and ayashi no ceres were really good!)
Arina tenemura (i love her manga, most of them have really interesting plots, and her art is soo pretty!)
Hino Matsuri (her work is awesome!!! especially vampire knight)

Arina Tanemura is my favorite manga-ka also. I've loved every single manga she's ever made (especially the most recent, Shinshi Doumei Cross). I mean...I love some manga more than ShinKuro and the others, but she's the only manga-ka that I love every single manga for.